US5752334A - Dumping system for a dragline bucket - Google Patents
Dumping system for a dragline bucket Download PDFInfo
- Publication number
- US5752334A US5752334A US08/752,457 US75245796A US5752334A US 5752334 A US5752334 A US 5752334A US 75245796 A US75245796 A US 75245796A US 5752334 A US5752334 A US 5752334A
- Authority
- US
- United States
- Prior art keywords
- bucket
- dumping
- roller
- rail
- hoist
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/46—Dredgers; Soil-shifting machines mechanically-driven with reciprocating digging or scraping elements moved by cables or hoisting ropes ; Drives or control devices therefor
- E02F3/58—Component parts
- E02F3/60—Buckets, scrapers, or other digging elements
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/46—Dredgers; Soil-shifting machines mechanically-driven with reciprocating digging or scraping elements moved by cables or hoisting ropes ; Drives or control devices therefor
- E02F3/48—Drag-lines
Definitions
- This invention relates generally to buckets used in surface mining equipment for digging, scraping, dragging and excavating and, more particularly, to systems for dumping such buckets.
- Dragline buckets are used for various purposes such as open cast surface mining. In such operations, buckets are suspended from angularly upward extending booms or the like by a hoist line, and are manipulated by the hoist line, draglines, dump ropes, and sometimes other types of control lines, to dig or scrape earth from one location into the bucket and move the earth filled bucket to another location where it is dumped. Because of the size and cost of the machinery involved, it is highly desirable to obtain maximum use of the machinery in order to correspondingly achieve maximum cost efficiency. The design of the buckets used with such machinery must accordingly be as easy to use as possible.
- Bucket hoist mechanisms are normally connected to trunnions affixed to either the outer side walls or the inner side walls of the bucket. Buckets having outside hoist trunnions require hoist chains having a lower section connected to the trunnions by trunnion links and a spreader bar between the lower hoist chain sections leading to each of the opposite sides of the bucket.
- Hoist trunnion deflectors may also be affixed to the bucket sides in front of the trunnions to deflect the flow of the material being dug away from the hoist trunnions. Due to the location of these items and their protrusion from the sides of the bucket, they reduce the efficiency of dragging the bucket through the material. They also wear quickly due to the abrasive nature of the material sliding and flowing along them.
- the spreader bar is required to prevent the lower section of the hoist chains from rubbing on the sides of the bucket and adds significant weight to the bucket rigging assembly. Further, if the operator of the dragline lowers the hoist rigging too far and too quickly, the spreader bar will impact the bucket and cause damage to both the bucket and the bar.
- the present invention is directed toward an improved dumping system which overcomes the problems of both inside and outside mounted trunnions on the side walls of a dragline bucket.
- the invention is carried out in a dragline bucket by providing the bucket with first and second contoured dumping rails respectively supported on first and second spaced apart sidewalls and a rear wall connecting the two side walls.
- Each dumping rail extends from above the sidewall on which it is supported to the rear wall on which it is also supported.
- Roller means is connected to hoist means and support the bucket in a suspended manner. The roller means engages the first and second dumping rails and is movable along the dumping rails from a forward position in which an open end of the bucket faces substantially horizontally, to a rearward position in which the open end of the bucket faces downwardly and material in the bucket is dumped.
- the dumping rails adjacent to the rear wall of the bucket are preferably spaced from the rear wall of the bucket and the roller means has first and second roller means which respectively engage the undersides of the first and second dumping rails.
- Each dumping rail may be angled relative to the sidewall on which it is supported and transversely to its length in an upward direction toward the opposite sidewall on which the other dumping rail is supported.
- the first and second roller means are separately connected to first and second hoist chains which extend from above the bucket at an angle toward the dumping rails and the first and second rollers each have an axis which is substantially perpendicular to the lengths of the respective first and second hoist chains.
- Each of the dumping rails is spaced from the rear of the bucket.
- the dumping rail may have a contour shape along its length which has a controlling affect on the movement of the bucket along the dumping rails.
- the roller means may also include rollers engaging the upper sides of the dumping rails and means for limiting the speed of the rollers such as brake or clutch mechanisms.
- FIG. 1 is a side elevation view of a dragline in operation
- FIG. 2 is a side elevation view of the bucket having the dump system according to the invention.
- FIG. 3A is a side elevation view of the bucket shown in FIG. 2 suspended by a hoist rope with the open end of the bucket facing forward;
- FIG. 3B is a side elevation view of the bucket shown in FIG. 3A with the bucket in a mid-dump position and the open end of the bucket facing partially downward;
- FIG. 3C is a bucket as shown in FIG. 3A with the open end of the bucket facing downward and the bucket in a full dump position;
- FIG. 4 is a rear elevation view of the bucket as shown in FIG. 3A;
- FIG. 5 is a top plan view of the bucket shown in FIG. 3A.
- FIG. 6 is a rear elevation view, in cross-section, illustrating an alternative embodiment of the invention.
- FIG. 7 is a side elevation view illustrating an alternative embodiment of the invention.
- FIG. 8 is a side elevation view illustrating a further alternative embodiment of the invention.
- a dragline 2 comprises a housing and frame 4 including a machinery house and operator's cab, a boom 6 extending angularly upward from the main housing and frame, a bucket hoist system 10 and a bucket drag system 12.
- a bucket 8 is connected to the bucket hoist system 10 and the bucket drag system 12 and can be swung in directions substantially parallel to the ground 14 by swinging the bucket from the boom.
- the bucket hoist system 10 and bucket drag system 12 respectively include a hoist rope 14 and a drag rope 16 which are taken in or paid out by drive means (not shown) within the main housing and frame 4.
- the bucket 8 is dragged along the ground 15 when the drag rope 16 is taken in to scrape material comprising part of the ground 15 into the bucket. Controls for the operation of the hoist system, the drag system and the swing drive system are located within the operator's house on the housing and frame 4.
- the hoist system 10 includes hoist chains 18, and 20, a center link 24 connected to an upper end of the hoist chains 18, 20 and a hoist link, socket and equalizer 26 connecting the hoist rope 14 to the center link 24.
- the drag system 12 includes a drag chain 28 connected to an open front end 5 of the bucket 8 and connected to a drag link 30 which, in turn, is affixed to the drag rope 16.
- Hoist or dump ropes 32 have opposite ends connected to the bucket 8 and the drag link 30 and are reeved over dump sheaves 34 attached to the center link 24 by a dump block equalizer linkage 36.
- the bucket 8 comprises a pair of side walls 46, 48 and a bottom wall 50 into which material being dug moves as the bucket is dragged in the direction of the open front end 52, as shown in FIG. 1.
- a rear wall 54 is connected to the side walls 46, 48 and the bottom 50.
- a dump rail assembly 56 is mounted on the side wall 46 and the rear wall 54 and includes support arms 58 and a contoured dump rail 60.
- a dump rail assembly 62 is mounted on the side wall 48 and rear wall 54 of the bucket.
- the dump rail assembly 62 includes a support wall 64 and a contoured dump rail 66.
- the hoist chains 18 and 20 respectively include roller assemblies 68 and 70 at their lower ends 72 and 74.
- the roller assembly 68 includes a roller link 76 connected to the end 72 of the chain 18 and a roller arm 78 pivotally pinned to the roller link 76.
- a roller 80 is rotatably mounted on the roller arm 78 in engagement with the underside 61 of the contoured rail 60.
- the roller assembly 70 includes a roller link 82 pivotally connected to the end 74 of hoist chain 20, a roller arm 84 connected to the roller link 82, and a roller 86 rotatably mounted on the roller arm 84 in engagement with the underside 67 of the contoured rail 66. As can be best seen in FIG.
- the contoured rails 60 and 66 are both inclined toward the vertical center line of the bucket 8 to the extent necessary to maintain the rollers 80 and 86 in alignment with the hoist chains to which they are connected. Thereby, the axis about which the rollers 80 and 86 rotate are perpendicular to the extended length of the respective hoist chains 18 and 20.
- the bucket 8 In its operation, the bucket 8 is dragged along the ground and into the material to be dug by the drag rope 16 until material moving through the open front end 52 of the bucket has moved into and loaded the bucket. With the drag rope 16 maintained sufficiently taut to keep the dump rope 32 correspondingly taut so that the open end 52 of the bucket is maintained facing forward or slightly upward, as shown in FIG. 3A, the hoist rope 14 is taken into the housing and frame 4 to lift the bucket. The machine housing and frame 4 and boom 6 are then swung to a location where it is desired to dump the material in the bucket. To dump the bucket, the drag rope 16 is released to thereby permit the dump rope 32 to relax. This permits the front open end 52 of the bucket to move downward toward and through a mid-dump position as shown in FIG.
- the roller assemblies 68 and 70 begin to roll respectively along the undersides 61 and 67 of the contoured rails 60 and 66 toward the rear wall 54 of the bucket.
- the weight of the bucket and the material in it continues to lower the front open end 52 of the bucket until the bucket reaches its full dump position with the front open end facing substantially downward as shown in FIG. 3C.
- the roller assemblies 68 and 70 continue to follow the contour of the rails 60 and 66 to a position opposite the rear wall 54 of the bucket. The dumping operation is thus completed.
- FIG. 6 an alternative embodiment of the dump system is illustrated in which the components are identical to those shown in FIGS. 2A-2C, 4 and 5, with the exception of the roller assemblies 68 and 70.
- the alternate embodiment relates to the roller assemblies, which are identical to each other, and therefore only one of the alternate roller assemblies will be described.
- the contoured rail 60 has a lower side 61 and an upper side 88.
- the roller assembly 90 has a roller arm 92 supporting both a lower roller 80 and a second upper roller 94 engaging the upper side 88 of the rail 60. The two rollers thus have a clamping action to securely hold the roller assembly 90 on the rail 60.
- At least one of the roller assemblies such as roller assembly 90 may include a speed control device in the form of a roller braking mechanism such as clutch plates 96 and 98.
- FIGS. 7 and 8 Further alternative embodiments of the dump system are shown in FIGS. 7 and 8 and relate to the contour of the dump rails.
- the dump rail 100 follows a path somewhat parallel to the top edge 47 of the sidewall 46 relative to the view of FIG. 7, until the rail 100 is approximately opposite the rear wall 54. This contour has the effect of slowing the movement of the bucket in its return to a horizontal or digging position.
- the dump rail 102 follows a path having a relatively larger curvature than rail 60 in the portion of the rail 102 opposite the upper portion 55 of the rear wall 54.
- the dumping system locates the components of the dumping system away from the flow of the material being dug and its abrasive wear effects. Further, the components of the dumping system are positioned such that they do not interfere with material flow inside of the bucket or interfere with the bucket moving through the material outside of the bucket.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Load-Engaging Elements For Cranes (AREA)
- Loading Or Unloading Of Vehicles (AREA)
Abstract
Description
Claims (15)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/752,457 US5752334A (en) | 1996-11-15 | 1996-11-15 | Dumping system for a dragline bucket |
CA002204714A CA2204714C (en) | 1996-11-15 | 1997-05-07 | Dumping system for a dragline bucket |
AU28412/97A AU727519B2 (en) | 1996-11-15 | 1997-07-01 | Dumping System for a Dragline Bucket |
ZA9706118A ZA976118B (en) | 1996-11-15 | 1997-07-09 | Dumping system for a dragline bucket. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/752,457 US5752334A (en) | 1996-11-15 | 1996-11-15 | Dumping system for a dragline bucket |
Publications (1)
Publication Number | Publication Date |
---|---|
US5752334A true US5752334A (en) | 1998-05-19 |
Family
ID=25026411
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US08/752,457 Expired - Fee Related US5752334A (en) | 1996-11-15 | 1996-11-15 | Dumping system for a dragline bucket |
Country Status (4)
Country | Link |
---|---|
US (1) | US5752334A (en) |
AU (1) | AU727519B2 (en) |
CA (1) | CA2204714C (en) |
ZA (1) | ZA976118B (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030066212A1 (en) * | 2001-10-02 | 2003-04-10 | Thomas Anthony Meyers | Excavator bucket |
US20090183397A1 (en) * | 2008-01-23 | 2009-07-23 | Esco Corporation | Dragline Bucket, Rigging And System |
WO2011063464A1 (en) * | 2009-11-26 | 2011-06-03 | Cqms Pty Ltd | A rigging assembly for a dragline excavator |
US20110272656A1 (en) * | 2010-05-10 | 2011-11-10 | Bradken Resources Pty Limited | Hoist rope equaliser |
US20120291318A1 (en) * | 2010-01-22 | 2012-11-22 | Reece Attwood | Spreader component for a dragline excavator |
US8936426B2 (en) | 2011-04-13 | 2015-01-20 | Allied Power Products, Inc. | Suspended dumping system |
US8984779B2 (en) | 2012-01-31 | 2015-03-24 | Harnischfeger Technologies, Inc. | Shovel with passive tilt control |
USRE48978E1 (en) * | 2017-04-21 | 2022-03-22 | Caterpillar Inc. | Dragline bucket |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US838892A (en) * | 1906-09-08 | 1906-12-18 | John W Page | Excavating-scoop. |
US1017293A (en) * | 1911-03-30 | 1912-02-13 | Eric Johnson | Excavating-scraper. |
US1383913A (en) * | 1919-11-28 | 1921-07-05 | Pierpont E Dutcher | Excavating apparatus |
US2229351A (en) * | 1941-01-21 | Draglinescraper | ||
US2359303A (en) * | 1943-11-06 | 1944-10-03 | Bucyrus Erie Co | Dragline excavator |
-
1996
- 1996-11-15 US US08/752,457 patent/US5752334A/en not_active Expired - Fee Related
-
1997
- 1997-05-07 CA CA002204714A patent/CA2204714C/en not_active Expired - Fee Related
- 1997-07-01 AU AU28412/97A patent/AU727519B2/en not_active Ceased
- 1997-07-09 ZA ZA9706118A patent/ZA976118B/en unknown
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2229351A (en) * | 1941-01-21 | Draglinescraper | ||
US838892A (en) * | 1906-09-08 | 1906-12-18 | John W Page | Excavating-scoop. |
US1017293A (en) * | 1911-03-30 | 1912-02-13 | Eric Johnson | Excavating-scraper. |
US1383913A (en) * | 1919-11-28 | 1921-07-05 | Pierpont E Dutcher | Excavating apparatus |
US2359303A (en) * | 1943-11-06 | 1944-10-03 | Bucyrus Erie Co | Dragline excavator |
Cited By (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6834449B2 (en) * | 2001-10-02 | 2004-12-28 | Thomas Anthony Meyers | Excavator bucket |
US20030066212A1 (en) * | 2001-10-02 | 2003-04-10 | Thomas Anthony Meyers | Excavator bucket |
US8250785B2 (en) | 2008-01-23 | 2012-08-28 | Esco Corporation | Dragline bucket, rigging and system |
US20090183397A1 (en) * | 2008-01-23 | 2009-07-23 | Esco Corporation | Dragline Bucket, Rigging And System |
US7774959B2 (en) | 2008-01-23 | 2010-08-17 | Esco Corporation | Dragline bucket, rigging and system |
US20100269378A1 (en) * | 2008-01-23 | 2010-10-28 | Esco Corporation | Dragline Bucket, Rigging and System |
US8572870B2 (en) | 2008-01-23 | 2013-11-05 | Esco Corporation | Dragline bucket, rigging and system |
WO2011063464A1 (en) * | 2009-11-26 | 2011-06-03 | Cqms Pty Ltd | A rigging assembly for a dragline excavator |
CN102667007A (en) * | 2009-11-26 | 2012-09-12 | 昆士兰中部矿业供应有限公司 | A rigging assembly for a dragline excavator |
AU2010324538B2 (en) * | 2009-11-26 | 2014-09-25 | Cqms Pty Ltd | A rigging assembly for a dragline excavator |
CN102667007B (en) * | 2009-11-26 | 2015-05-13 | 昆士兰中部矿业供应有限公司 | A rigging assembly for a dragline excavator |
US20120291318A1 (en) * | 2010-01-22 | 2012-11-22 | Reece Attwood | Spreader component for a dragline excavator |
US9169616B2 (en) * | 2010-01-22 | 2015-10-27 | Bradken Resources Pty Limited | Spreader component for a dragline excavator |
US20110272656A1 (en) * | 2010-05-10 | 2011-11-10 | Bradken Resources Pty Limited | Hoist rope equaliser |
US9206018B2 (en) * | 2010-05-10 | 2015-12-08 | Bradken Resources Pty Limited | Hoist rope equaliser |
US8936426B2 (en) | 2011-04-13 | 2015-01-20 | Allied Power Products, Inc. | Suspended dumping system |
US8984779B2 (en) | 2012-01-31 | 2015-03-24 | Harnischfeger Technologies, Inc. | Shovel with passive tilt control |
US9340949B2 (en) | 2012-01-31 | 2016-05-17 | Harnischfeger Technologies, Inc. | Shovel with passive tilt control |
CN103225324B (en) * | 2012-01-31 | 2017-08-25 | 哈尼施费格尔技术公司 | The forklift controlled with passive tilt |
USRE48978E1 (en) * | 2017-04-21 | 2022-03-22 | Caterpillar Inc. | Dragline bucket |
Also Published As
Publication number | Publication date |
---|---|
AU727519B2 (en) | 2000-12-14 |
CA2204714A1 (en) | 1998-05-15 |
ZA976118B (en) | 1998-02-02 |
CA2204714C (en) | 2002-04-23 |
AU2841297A (en) | 1998-05-21 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: HARNISCHFEGER CORPORATION, WISCONSIN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:IMMEL, DARRYL;REEL/FRAME:008314/0978 Effective date: 19961105 |
|
AS | Assignment |
Owner name: HARNISCHFEGER TECHNOLOGIES, INC., DELAWARE Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:HARNISCHFEGER CORPORATION;REEL/FRAME:009168/0359 Effective date: 19980504 |
|
FPAY | Fee payment |
Year of fee payment: 4 |
|
AS | Assignment |
Owner name: BANKERS TRUST COMPANY, AS AGENT, NEW YORK Free format text: GRANT OF PATENT SECURITY INTEREST;ASSIGNOR:HARNISCHFEGER TECHNOLOGIES, INC., A DELAWARE CORPORATION;REEL/FRAME:011958/0584 Effective date: 20010629 |
|
REMI | Maintenance fee reminder mailed | ||
LAPS | Lapse for failure to pay maintenance fees | ||
STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
|
FP | Lapsed due to failure to pay maintenance fee |
Effective date: 20060519 |